What types of significant complications accompany hypermagnesemia in home PN patients?

• A. Cerebral and hepatic complications
• B. Cardiac and renal complications
• C. Pulmonary complications
• D. Skin complications

Answer: (A)

Hypermagnesemia mainly produces central nervous system effects because magnesium dampens neuronal excitability. When magnesium levels rise, patients become sleepy or mentally foggy, with decreasing reflexes and potential progression to coma. Those CNS signs—often referred to as cerebral manifestations—are the most prominent and clinically meaningful problems in this situation. In more severe cases, the same excess can slow cardiac conduction and depress respiration, but the hallmark concerns in home PN patients are the neurologic changes that reflect magnesium’s CNS depressant action. Hepatic involvement may occur as part of broader PN-related metabolic stress or liver vulnerability in these patients, so hepatic changes can accompany the neurologic picture, though they are not the primary effect of magnesium excess.